Marking device



FIG. 1 is a front elevational view of a marking device, showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an opposite elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view of the embodiment of FIG. 1 with the cap removed;

FIG. 8 is a rear elevational view of the embodiment of FIG. 7;

FIG. 9 is a side elevational view of FIG. 7;

FIG. 10 is an opposite side elevational view of FIG. 9;

FIG. 11 is a top plan view of FIG. 7; and,

FIG. 12 is a bottom plan view of FIG. 7. 

The ornamental design for a marking device, as shown and described. 